19 zips
| Zip Code | City | Population ↓ |
|---|---|---|
| 63116 | Saint Louis | 41,821 |
| 63118 | Saint Louis | 26,621 |
| 63109 | Saint Louis | 25,787 |
| 63139 | Saint Louis | 22,126 |
| 63108 | Saint Louis | 20,521 |
| 63111 | Saint Louis | 20,229 |
| 63104 | Saint Louis | 19,325 |
| 63112 | Saint Louis | 18,703 |
| 63110 | Saint Louis | 16,983 |
| 63115 | Saint Louis | 15,828 |
| 63113 | Saint Louis | 12,048 |
| 63107 | Saint Louis | 9,391 |
| 63103 | Saint Louis | 9,193 |
| 63106 | Saint Louis | 8,676 |
| 63147 | Saint Louis | 8,502 |
| 63120 | Saint Louis | 6,818 |
| 63101 | Saint Louis | 2,791 |
| 63102 | Saint Louis | 2,404 |
| 63155 | Saint Louis | 0 |
The data shown reflect ZCTAs from the US Census. As of 2024, there are 19 ZCTAs in St. Louis city, Missouri (US Census).